{
 "version": "2026-10-20",
 "license": "Dimension sheets are written by Xem Studio from the cited sources and are free to use (CC BY 4.0, attribute 'Xem Studio'). Linked files belong to their publishers under the license shown; Xem Studio does not host them. 'license_verified: false' means the license shown is from memory or the publisher's page as last read and should be confirmed at the link before commercial use.",
 "slug": "stirling-shafts-and-rods",
 "name": "Stirling shafts and rods: Ø3 rods, Ø5 / Ø8 D-flat crankshafts, Ø5 tube rods, Ø3 pins, thrust spacers",
 "kind": "hardware",
 "category": "Stirling engines",
 "group": "Drives & mechanisms",
 "year": null,
 "question": "What shafts and rods does a model Stirling engine need, and can I print them?",
 "tags": [
  "shaft",
  "crankshaft",
  "rod",
  "displacer rod",
  "pin",
  "spacer",
  "stirling",
  "long earth society",
  "d-flat"
 ],
 "aliases": [
  "stirling engine crankshaft stl",
  "3d printed shaft",
  "displacer rod",
  "5mm d shaft",
  "8mm crankshaft",
  "printed axle",
  "stick shaft for model engine"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": true,
 "free_files": 32,
 "url": "https://xemstudio.com/objects/stirling-shafts-and-rods/",
 "sheet_txt": "https://xemstudio.com/objects/stirling-shafts-and-rods/sheet.txt",
 "sheet": {
  "basis": "The shelf's interfaces: Ø3 displacer rods and pins, Ø5 shafts in 625 bearings, Ø8 in 608s, 5 mm tube piston rods with a Ø3.4 bore; D-flat 0.5 mm as on motor shafts so grub screws bite and the shaft cannot slip",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Every rod here is a solid model: you choose walls and infill. For shafts that carry load (crankshafts, pins) print 100 % infill or 6+ walls, lying flat (the D-flat side down on the bed gives a flat, accurate grub face and puts the layers along the shaft, which is how it bends).",
   "Which rod goes where: Ø3 rod: displacer rod from the displacer cap through the guide, bushings or the piston's crown bushing to the rod clevis or rhombic upper yoke. Ø3 crankshaft: in the crank head's 623 towers with the Ø3-bore crank discs. Ø5 D-flat: in the 625 crank stands and rhombic plates, carrying crank discs and the nut flywheel (b5). Ø8 D-flat: in the tri-clamp crank frame's 608s with the crank webs and flywheels (b8). Ø5 tube: piston rod from the piston plug, around the displacer rod. Ø3 pins: crank, wrist and link pins.",
   "Printed Ø5 / Ø8 crankshafts in bearings run fine at a few hundred rpm.",
   "Thrust spacers set the 1 mm gaps along the shaft (tower · web · rod · web · tower · flywheel): stack 1, 2, 3 and 5 mm pieces to fill a gap.",
   "Lengths: 2 in gamma crankshaft Ø5 × 100 between two 625 stands with the flywheel outside; tri-clamp crank frame Ø8 × 80; rhombic gear shafts Ø5 × 80 (one × 120 to carry the flywheel); displacer rod = displacer cap to clevis plus stroke, cut a 150 or 200 to length.",
   "LES: the shafts the engines turn on."
  ],
  "table": {
   "columns": [
    "part",
    "dia_mm",
    "length_mm",
    "feature",
    "fits",
    "steel equivalent"
   ],
   "rows": [
    [
     "Ø3 rod",
     3,
     100,
     "—",
     "displacer rod; rod clevis; displacer cap",
     "music wire / drill rod Ø3 h6"
    ],
    [
     "Ø3 rod",
     3,
     150,
     "—",
     "displacer rod; rod clevis; displacer cap",
     "music wire / drill rod Ø3 h6"
    ],
    [
     "Ø3 rod",
     3,
     200,
     "—",
     "displacer rod; rod clevis; displacer cap",
     "music wire / drill rod Ø3 h6"
    ],
    [
     "Ø3 crankshaft",
     3,
     40,
     "—",
     "crank head 623s; crank-disc-b3",
     "drill rod Ø3"
    ],
    [
     "Ø3 crankshaft",
     3,
     60,
     "—",
     "crank head 623s; crank-disc-b3",
     "drill rod Ø3"
    ],
    [
     "Ø3 crankshaft",
     3,
     80,
     "—",
     "crank head 623s; crank-disc-b3",
     "drill rod Ø3"
    ],
    [
     "Ø5 crankshaft",
     5,
     80,
     "D 0.5",
     "625 stands; rhombic gears; crank discs; flywheel b5",
     "Ø5 h6 ground rod"
    ],
    [
     "Ø5 crankshaft",
     5,
     100,
     "D 0.5",
     "625 stands; rhombic gears; crank discs; flywheel b5",
     "Ø5 h6 ground rod"
    ],
    [
     "Ø5 crankshaft",
     5,
     120,
     "D 0.5",
     "625 stands; rhombic gears; crank discs; flywheel b5",
     "Ø5 h6 ground rod"
    ],
    [
     "Ø5 crankshaft",
     5,
     150,
     "D 0.5",
     "625 stands; rhombic gears; crank discs; flywheel b5",
     "Ø5 h6 ground rod"
    ],
    [
     "Ø8 crankshaft",
     8,
     80,
     "D 0.5",
     "crank frame 608s; crank webs; flywheel b8",
     "Ø8 h6 rod"
    ],
    [
     "Ø8 crankshaft",
     8,
     100,
     "D 0.5",
     "crank frame 608s; crank webs; flywheel b8",
     "Ø8 h6 rod"
    ],
    [
     "Ø8 crankshaft",
     8,
     120,
     "D 0.5",
     "crank frame 608s; crank webs; flywheel b8",
     "Ø8 h6 rod"
    ],
    [
     "Ø5 tube rod",
     5,
     80,
     "Ø3.4 bore",
     "piston plug; rhombic lower yoke; flexure stack A",
     "K&S 5 mm brass tube"
    ],
    [
     "Ø5 tube rod",
     5,
     120,
     "Ø3.4 bore",
     "piston plug; rhombic lower yoke; flexure stack A",
     "K&S 5 mm brass tube"
    ],
    [
     "Ø5 tube rod",
     5,
     160,
     "Ø3.4 bore",
     "piston plug; rhombic lower yoke; flexure stack A",
     "K&S 5 mm brass tube"
    ],
    [
     "Ø3 pin",
     3,
     12,
     "—",
     "crank / wrist / link pins",
     "dowel 3 m6"
    ],
    [
     "Ø3 pin",
     3,
     16,
     "—",
     "crank / wrist / link pins",
     "dowel 3 m6"
    ],
    [
     "Ø3 pin",
     3,
     19,
     "—",
     "crank / wrist / link pins",
     "dowel 3 m6"
    ],
    [
     "Ø3 pin",
     3,
     20,
     "—",
     "crank / wrist / link pins",
     "dowel 3 m6"
    ],
    [
     "Ø3 spacers",
     3,
     "1 / 2 / 3 / 5",
     "—",
     "between bearings, webs, rods, flywheel",
     "washers"
    ],
    [
     "Ø5 spacers",
     5,
     "1 / 2 / 3 / 5",
     "—",
     "between bearings, webs, rods, flywheel",
     "washers"
    ],
    [
     "Ø8 spacers",
     8,
     "1 / 2 / 3 / 5",
     "—",
     "between bearings, webs, rods, flywheel",
     "washers"
    ]
   ]
  }
 },
 "sheet_text": "Stirling shafts and rods: Ø3 rods, Ø5 / Ø8 D-flat crankshafts, Ø5 tube rods, Ø3 pins, thrust spacers — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/stirling-shafts-and-rods/  (CC BY 4.0)\nBasis: The shelf's interfaces: Ø3 displacer rods and pins, Ø5 shafts in 625 bearings, Ø8 in 608s, 5 mm tube piston rods with a Ø3.4 bore; D-flat 0.5 mm as on motor shafts so grub screws bite and the shaft cannot slip\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Every rod here is a solid model: you choose walls and infill. For shafts that carry load (crankshafts, pins) print 100 % infill or 6+ walls, lying flat (the D-flat side down on the bed gives a flat, accurate grub face and puts the layers along the shaft, which is how it bends).\n- Which rod goes where: Ø3 rod: displacer rod from the displacer cap through the guide, bushings or the piston's crown bushing to the rod clevis or rhombic upper yoke. Ø3 crankshaft: in the crank head's 623 towers with the Ø3-bore crank discs. Ø5 D-flat: in the 625 crank stands and rhombic plates, carrying crank discs and the nut flywheel (b5). Ø8 D-flat: in the tri-clamp crank frame's 608s with the crank webs and flywheels (b8). Ø5 tube: piston rod from the piston plug, around the displacer rod. Ø3 pins: crank, wrist and link pins.\n- Printed Ø5 / Ø8 crankshafts in bearings run fine at a few hundred rpm.\n- Thrust spacers set the 1 mm gaps along the shaft (tower · web · rod · web · tower · flywheel): stack 1, 2, 3 and 5 mm pieces to fill a gap.\n- Lengths: 2 in gamma crankshaft Ø5 × 100 between two 625 stands with the flywheel outside; tri-clamp crank frame Ø8 × 80; rhombic gear shafts Ø5 × 80 (one × 120 to carry the flywheel); displacer rod = displacer cap to clevis plus stroke, cut a 150 or 200 to length.\n- LES: the shafts the engines turn on.\n\npart  dia_mm  length_mm  feature  fits  steel equivalent\nØ3 rod  3.0  100  —  displacer rod; rod clevis; displacer cap  music wire / drill rod Ø3 h6\nØ3 rod  3.0  150  —  displacer rod; rod clevis; displacer cap  music wire / drill rod Ø3 h6\nØ3 rod  3.0  200  —  displacer rod; rod clevis; displacer cap  music wire / drill rod Ø3 h6\nØ3 crankshaft  3.0  40  —  crank head 623s; crank-disc-b3  drill rod Ø3\nØ3 crankshaft  3.0  60  —  crank head 623s; crank-disc-b3  drill rod Ø3\nØ3 crankshaft  3.0  80  —  crank head 623s; crank-disc-b3  drill rod Ø3\nØ5 crankshaft  5.0  80  D 0.5  625 stands; rhombic gears; crank discs; flywheel b5  Ø5 h6 ground rod\nØ5 crankshaft  5.0  100  D 0.5  625 stands; rhombic gears; crank discs; flywheel b5  Ø5 h6 ground rod\nØ5 crankshaft  5.0  120  D 0.5  625 stands; rhombic gears; crank discs; flywheel b5  Ø5 h6 ground rod\nØ5 crankshaft  5.0  150  D 0.5  625 stands; rhombic gears; crank discs; flywheel b5  Ø5 h6 ground rod\nØ8 crankshaft  8.0  80  D 0.5  crank frame 608s; crank webs; flywheel b8  Ø8 h6 rod\nØ8 crankshaft  8.0  100  D 0.5  crank frame 608s; crank webs; flywheel b8  Ø8 h6 rod\nØ8 crankshaft  8.0  120  D 0.5  crank frame 608s; crank webs; flywheel b8  Ø8 h6 rod\nØ5 tube rod  5.0  80  Ø3.4 bore  piston plug; rhombic lower yoke; flexure stack A  K&S 5 mm brass tube\nØ5 tube rod  5.0  120  Ø3.4 bore  piston plug; rhombic lower yoke; flexure stack A  K&S 5 mm brass tube\nØ5 tube rod  5.0  160  Ø3.4 bore  piston plug; rhombic lower yoke; flexure stack A  K&S 5 mm brass tube\nØ3 pin  3.0  12  —  crank / wrist / link pins  dowel 3 m6\nØ3 pin  3.0  16  —  crank / wrist / link pins  dowel 3 m6\nØ3 pin  3.0  19  —  crank / wrist / link pins  dowel 3 m6\nØ3 pin  3.0  20  —  crank / wrist / link pins  dowel 3 m6\nØ3 spacers  3  1 / 2 / 3 / 5  —  between bearings, webs, rods, flywheel  washers\nØ5 spacers  5  1 / 2 / 3 / 5  —  between bearings, webs, rods, flywheel  washers\nØ8 spacers  8  1 / 2 / 3 / 5  —  between bearings, webs, rods, flywheel  washers\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Long Earth Society: Engine builds — web, video — LES site — https://longearthsociety.com/engineering/\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 32 parts): https://xemstudio.com/files/hardware/stirling-shafts-and-rods/index.json\nAPI: https://xemstudio.com/api/geometry?object=stirling-shafts-and-rods\n",
 "sources": [
  {
   "publisher": "Long Earth Society",
   "title": "Engine builds",
   "url": "https://longearthsociety.com/engineering/",
   "formats": [
    "web",
    "video"
   ],
   "license": "LES site",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "stirling-linkage-fittings",
  "crank-conrod-flywheel-kit",
  "nut-weighted-flywheels",
  "tri-clamp-power-pistons",
  "ball-bearings-metric",
  "shaft-collars-clips-and-shafts"
 ],
 "fits": [
  {
   "role": "Goes in or on",
   "items": [
    {
     "slug": "stirling-linkage-fittings",
     "why": "Ø5 shafts in the 625 crank stands; Ø3 rods in the rod clevises"
    },
    {
     "slug": "tri-clamp-power-pistons",
     "why": "Ø8 shaft in the crank frame's 608s"
    },
    {
     "slug": "rhombic-drive-kit",
     "why": "Ø5 gear shafts in the plates' 625s"
    },
    {
     "slug": "alpha-v-twin-frame",
     "why": "Ø5 shaft in the boss; Ø3 × 20 crank pin"
    },
    {
     "slug": "tri-clamp-displacers-and-heads",
     "why": "Ø3 displacer rod and the crank head's Ø3 shaft"
    },
    {
     "slug": "ltd-coffee-cup-engine-kit",
     "why": "Ø3 crankshaft in the 623 stands"
    }
   ]
  },
  {
   "role": "Connects to",
   "items": [
    {
     "slug": "nut-weighted-flywheels",
     "why": "Ø3 / Ø5 / Ø8 hubs on the D-flat"
    },
    {
     "slug": "crank-conrod-flywheel-kit",
     "why": "crank discs and flywheels"
    },
    {
     "slug": "counterweighted-cranks",
     "why": "crank discs and webs"
    }
   ]
  },
  {
   "role": "Alternatives",
   "items": [
    {
     "slug": "shaft-collars-clips-and-shafts",
     "why": "steel shaft stock dimensions"
    },
    {
     "slug": "brass-tube-ks",
     "why": "brass tube rods"
    },
    {
     "slug": "dowel-pins-metric",
     "why": "steel Ø3 pins"
    }
   ]
  },
  {
   "role": "Also needed",
   "items": [
    {
     "slug": "ball-bearings-metric",
     "why": "623 (Ø3), 625 (Ø5), 608 (Ø8)"
    },
    {
     "slug": "set-screws-metric",
     "why": "M3 grubs on the flat"
    }
   ]
  }
 ],
 "dimensions": "exact (nominal, no printing tolerance)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no printing tolerance. Where a part meets another part, the object lists its mating features (feature, exact size, what it mates with, fit class: press, slide, run, socket, clamp or designed). Apply your process's allowance to those features only; 'designed' gaps are part of the design and stay as drawn.",
 "mating": [
  {
   "feature": "shafts, rods, pins",
   "exact": "Ø3 / Ø5 / Ø8",
   "mates": "the bores listed on each mating object",
   "fit": "slide",
   "files": "rod-"
  },
  {
   "feature": "D-flat",
   "exact": "0.5 deep",
   "mates": "M3 grubs in hubs",
   "fit": "designed",
   "files": "crankshaft-"
  },
  {
   "feature": "tube rod bore",
   "exact": "Ø3.4",
   "mates": "Ø3 rod (no contact)",
   "fit": "designed",
   "files": "tube-rod-"
  },
  {
   "feature": "spacer bore",
   "exact": "Ø3 / Ø5 / Ø8",
   "mates": "shaft",
   "fit": "slide",
   "files": "spacer-"
  }
 ],
 "fit_classes": {
  "press": "stays put: pin, tube, bearing or magnet held by interference. Typical FDM: hole +0.0 to +0.1 mm on diameter.",
  "slide": "assembles by hand and is held by a grub, pinch or clamp: shaft in a hub, rod in a socket, spigot in a bore. Typical FDM: +0.2 mm.",
  "run": "turns or slides in use: pin in a link, rod through a guide. Typical FDM: +0.3 mm.",
  "socket": "large sliding fit: syringe barrel, sleeve, bobbin in a bore. Typical FDM: +0.3 mm.",
  "clamp": "split part that closes on the mating part with screws: make it at size.",
  "designed": "a gap that is part of the design (piston fit option, displacer gap, air gap): do not change."
 },
 "faq": [
  {
   "q": "Can I 3D print a crankshaft for a Stirling engine?",
   "a": "Yes for Ø5 and Ø8 shafts at model speeds: print the D-flat shaft lying flat, flat side down, 100 % infill."
  },
  {
   "q": "What diameter shafts does this library use?",
   "a": "Ø3 for displacer rods, pins and the crank head's shaft; Ø5 for crankshafts in 625 bearings; Ø8 for the tri-clamp crank frame in 608s; a 5 mm tube with a Ø3.4 bore for piston rods that carry a displacer rod inside."
  },
  {
   "q": "Why a D-flat?",
   "a": "So the M3 grub screws in the crank discs, webs and flywheels bear on a flat and the part cannot slip around the shaft. 0.5 mm deep, as on motor shafts."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "rod-3x100",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/rod-3x100.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/rod-3x100.stl",
   "note": "Ø3 × 100 solid rod: displacer rod (into the displacer cap's grub, through the guide / bushings / piston bushing, into the rod clevis)"
  },
  {
   "file": "rod-3x150",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/rod-3x150.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/rod-3x150.stl",
   "note": "Ø3 × 150 solid rod: displacer rod (into the displacer cap's grub, through the guide / bushings / piston bushing, into the rod clevis)"
  },
  {
   "file": "rod-3x200",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/rod-3x200.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/rod-3x200.stl",
   "note": "Ø3 × 200 solid rod: displacer rod (into the displacer cap's grub, through the guide / bushings / piston bushing, into the rod clevis)"
  },
  {
   "file": "crankshaft-3x40",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/crankshaft-3x40.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/crankshaft-3x40.stl",
   "note": "Ø3 × 40 solid crankshaft for the crank head's 623 towers and the Ø3-bore crank discs; can engine skewer replacement"
  },
  {
   "file": "crankshaft-3x60",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/crankshaft-3x60.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/crankshaft-3x60.stl",
   "note": "Ø3 × 60 solid crankshaft for the crank head's 623 towers and the Ø3-bore crank discs; can engine skewer replacement"
  },
  {
   "file": "crankshaft-3x80",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/crankshaft-3x80.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/crankshaft-3x80.stl",
   "note": "Ø3 × 80 solid crankshaft for the crank head's 623 towers and the Ø3-bore crank discs; can engine skewer replacement"
  },
  {
   "file": "crankshaft-5x80-dflat",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/crankshaft-5x80-dflat.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/crankshaft-5x80-dflat.stl",
   "note": "Ø5 × 80 crankshaft with a full-length 0.5 mm D-flat (4.5 across) for the grubs; 625 crank stands, rhombic gears, crank discs, nut flywheel b5. Print flat side down"
  },
  {
   "file": "crankshaft-5x100-dflat",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/crankshaft-5x100-dflat.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/crankshaft-5x100-dflat.stl",
   "note": "Ø5 × 100 crankshaft with a full-length 0.5 mm D-flat (4.5 across) for the grubs; 625 crank stands, rhombic gears, crank discs, nut flywheel b5. Print flat side down"
  },
  {
   "file": "crankshaft-5x120-dflat",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/crankshaft-5x120-dflat.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/crankshaft-5x120-dflat.stl",
   "note": "Ø5 × 120 crankshaft with a full-length 0.5 mm D-flat (4.5 across) for the grubs; 625 crank stands, rhombic gears, crank discs, nut flywheel b5. Print flat side down"
  },
  {
   "file": "crankshaft-5x150-dflat",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/crankshaft-5x150-dflat.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/crankshaft-5x150-dflat.stl",
   "note": "Ø5 × 150 crankshaft with a full-length 0.5 mm D-flat (4.5 across) for the grubs; 625 crank stands, rhombic gears, crank discs, nut flywheel b5. Print flat side down"
  },
  {
   "file": "crankshaft-8x80-dflat",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/crankshaft-8x80-dflat.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/crankshaft-8x80-dflat.stl",
   "note": "Ø8 × 80 crankshaft with a full-length 0.5 mm D-flat (7.5 across); tri-clamp crank frame 608s, crank webs, flywheels b8. Print flat side down"
  },
  {
   "file": "crankshaft-8x100-dflat",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/crankshaft-8x100-dflat.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/crankshaft-8x100-dflat.stl",
   "note": "Ø8 × 100 crankshaft with a full-length 0.5 mm D-flat (7.5 across); tri-clamp crank frame 608s, crank webs, flywheels b8. Print flat side down"
  },
  {
   "file": "crankshaft-8x120-dflat",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/crankshaft-8x120-dflat.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/crankshaft-8x120-dflat.stl",
   "note": "Ø8 × 120 crankshaft with a full-length 0.5 mm D-flat (7.5 across); tri-clamp crank frame 608s, crank webs, flywheels b8. Print flat side down"
  },
  {
   "file": "tube-rod-5x3.4x80",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/tube-rod-5x3.4x80.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/tube-rod-5x3.4x80.stl",
   "note": "Ø5 × Ø3.4 × 80 tube piston rod: into the piston plug socket, onto the rhombic lower yoke or the flexure collars; the Ø3 displacer rod runs inside"
  },
  {
   "file": "tube-rod-5x3.4x120",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/tube-rod-5x3.4x120.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/tube-rod-5x3.4x120.stl",
   "note": "Ø5 × Ø3.4 × 120 tube piston rod: into the piston plug socket, onto the rhombic lower yoke or the flexure collars; the Ø3 displacer rod runs inside"
  },
  {
   "file": "tube-rod-5x3.4x160",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/tube-rod-5x3.4x160.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/tube-rod-5x3.4x160.stl",
   "note": "Ø5 × Ø3.4 × 160 tube piston rod: into the piston plug socket, onto the rhombic lower yoke or the flexure collars; the Ø3 displacer rod runs inside"
  },
  {
   "file": "pin-3x12",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/pin-3x12.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/pin-3x12.stl",
   "note": "Ø3 × 12 pin: crank pin, wrist pin, link pivot"
  },
  {
   "file": "pin-3x16",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/pin-3x16.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/pin-3x16.stl",
   "note": "Ø3 × 16 pin: crank pin, wrist pin, link pivot"
  },
  {
   "file": "pin-3x19",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/pin-3x19.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/pin-3x19.stl",
   "note": "Ø3 × 19 pin: crank pin, wrist pin, link pivot"
  },
  {
   "file": "pin-3x20",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/pin-3x20.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/pin-3x20.stl",
   "note": "Ø3 × 20 pin: crank pin, wrist pin, link pivot"
  },
  {
   "file": "spacer-3mm-t1",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/spacer-3mm-t1.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/spacer-3mm-t1.stl",
   "note": "thrust spacer for a Ø3 shaft, 1 mm: sets the 1 mm gaps between tower, web, rod and flywheel"
  },
  {
   "file": "spacer-3mm-t2",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/spacer-3mm-t2.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/spacer-3mm-t2.stl",
   "note": "thrust spacer for a Ø3 shaft, 2 mm: sets the 1 mm gaps between tower, web, rod and flywheel"
  },
  {
   "file": "spacer-3mm-t3",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/spacer-3mm-t3.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/spacer-3mm-t3.stl",
   "note": "thrust spacer for a Ø3 shaft, 3 mm: sets the 1 mm gaps between tower, web, rod and flywheel"
  },
  {
   "file": "spacer-3mm-t5",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/spacer-3mm-t5.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/spacer-3mm-t5.stl",
   "note": "thrust spacer for a Ø3 shaft, 5 mm: sets the 1 mm gaps between tower, web, rod and flywheel"
  },
  {
   "file": "spacer-5mm-t1",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/spacer-5mm-t1.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/spacer-5mm-t1.stl",
   "note": "thrust spacer for a Ø5 shaft, 1 mm: sets the 1 mm gaps between tower, web, rod and flywheel"
  },
  {
   "file": "spacer-5mm-t2",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/spacer-5mm-t2.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/spacer-5mm-t2.stl",
   "note": "thrust spacer for a Ø5 shaft, 2 mm: sets the 1 mm gaps between tower, web, rod and flywheel"
  },
  {
   "file": "spacer-5mm-t3",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/spacer-5mm-t3.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/spacer-5mm-t3.stl",
   "note": "thrust spacer for a Ø5 shaft, 3 mm: sets the 1 mm gaps between tower, web, rod and flywheel"
  },
  {
   "file": "spacer-5mm-t5",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/spacer-5mm-t5.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/spacer-5mm-t5.stl",
   "note": "thrust spacer for a Ø5 shaft, 5 mm: sets the 1 mm gaps between tower, web, rod and flywheel"
  },
  {
   "file": "spacer-8mm-t1",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/spacer-8mm-t1.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/spacer-8mm-t1.stl",
   "note": "thrust spacer for a Ø8 shaft, 1 mm: sets the 1 mm gaps between tower, web, rod and flywheel"
  },
  {
   "file": "spacer-8mm-t2",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/spacer-8mm-t2.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/spacer-8mm-t2.stl",
   "note": "thrust spacer for a Ø8 shaft, 2 mm: sets the 1 mm gaps between tower, web, rod and flywheel"
  },
  {
   "file": "spacer-8mm-t3",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/spacer-8mm-t3.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/spacer-8mm-t3.stl",
   "note": "thrust spacer for a Ø8 shaft, 3 mm: sets the 1 mm gaps between tower, web, rod and flywheel"
  },
  {
   "file": "spacer-8mm-t5",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/spacer-8mm-t5.step",
   "stl": "https://xemstudio.com/files/hardware/stirling-shafts-and-rods/spacer-8mm-t5.stl",
   "note": "thrust spacer for a Ø8 shaft, 5 mm: sets the 1 mm gaps between tower, web, rod and flywheel"
  }
 ],
 "markdown": "https://xemstudio.com/objects/stirling-shafts-and-rods/index.md"
}